body {
  font-family: "Segoe UI", sans-serif;
  background-color: #e6f2ff; /* 浅蓝背景 */
  color: #003366;
  margin: 0;
  padding: 0;
}

.container {
  width: 350px;
  margin: 100px auto;
  padding: 30px;
  background-color: white;
  border: 2px solid #AFEEEE;
  border-radius: 10px;
  box-shadow: 0 0 10px #66cccc;
}

h1, h2 {
  text-align: center;
  color: #006699;
}

form {
  display: flex;
  flex-direction: column;
}

label {
  margin-top: 10px;
  font-weight: bold;
}

input {
  padding: 8px;
  margin-top: 5px;
  border: 1px solid #99cc99;
  border-radius: 4px;
}

button {
  margin-top: 20px;
  padding: 10px;
  background-color: #33cc99;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

button:hover {
  background-color: #28a87b;
}

#message {
  margin-top: 15px;
  text-align: center;
  color: #cc0000;
}

header {
  background-color: #00BFFF;
}